Symbol: SIOCGIFMTU
regress/sbin/ifconfig/ifaddr.c
526
if (ioctl(sock, SIOCGIFMTU, (caddr_t)ifr) == -1)
sbin/ifconfig/ifconfig.c
1066
if (ioctl(sock, SIOCGIFMTU, (caddr_t)ifr) == -1)
sys/net/if.c
2180
case SIOCGIFMTU:
sys/net/if.c
2644
case SIOCGIFMTU: